Stoker apparatus for heating boilers



FIG. 1 is a perspective view of a stoker apparatus for heating boilers, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an elevational view of the opposite side thereof;

FIG. 5 is a left end elevational view thereof; and

FIG. 6 is a right end elevational view thereof. 

The ornamental design for a stoker apparatus for heating boilers, substantially as shown and described. 